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LM146 Datasheet(PDF) 1 Page - STMicroelectronics |
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LM146 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 4 page 1/4 s PROGRAMMABLE ELECTRICAL CHARAC- TERISTICS s LOW SUPPLY CURRENT (250 µA/amplifier) s GAIN-BANDWITH PRODUCT : 1MHz s LARGE DC VOLTAGE GAIN : 120dB s LOW NOISE VOLTAGE : 28nV/ √Hz s WIDE POWER SUPPLY RANGE / ±1.5V to ±22V s CLASSE AB OUTPUT STAGE. NO CROSS-OVER DISTORTION s OVERLOAD PROTECTION FOR INPUTS AND OUTPUTS DESCRIPTION The LM346 consists of four independent, high gain, internally compensated, low power program- mable amplifiers. Two external resistors (Rset) al- low the user to program the gain-bandwith prod- uct, slew rate, supply current, input bias current, input offset current and input noise. For example the user can trade-off supply current for bandwith or optimize noise figure for a given source resis- tance. In a similar way other amplifier characteris- tics can be tailored to the application. Except for the two programming pins at the end of the package the LM346 pin out is the same as the LM324 and LM348. PROGRAMMING EQUATIONS : Total supply current = 1mA (Iset = 10µA) Gain bandwith product = 1MHz (Iset = 10µA) Slew rate = 0.5V/ µs (I set = 10µΑ) Input bias current ≈30nA (I set = 10µΑ) Iset = current into pin 8 and pin 9 (see schematic diagram) ORDER CODE N = Dual in Line Package (DIP)) PIN CONNECTIONS (top view) Part Number Temperature Range Package N LM146 -55°C, +125°C • LM246 -40°C, +105°C • LM346 0°C, +70°C • Example : LM246N I se t Vcc+ Vcc - – 0.6 V – R set ----------------------------------------------------- = N DIP16 (Plastic Package) CC V + 1 2 3 4 5 6 7 9 10 11 12 13 14 N o n-in v e rtin g Inp u t 2 - + - + Ou tp u t 1 N o n-in v e rtin g in put 1 In v e rtin g Inpu t 1 - CC V In v e rtin g Inp ut 2 Ou tp u t 2 8 15 16 Ou tp u t 4 In v e rtin g Inp ut 4 N on-in v e rtin g inp ut 4 N o n -in v e rtin g in p u t 3 In v e rtin g in put 3 Ou tp u t 3 Set Set LM146 LM246 LM346 PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIER April 2003 |
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